Which of the following factors increase the h | vedclass

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(A) The heart rate is regulated by the autonomic nervous system and endocrine factors:$1$. Sympathetic nerve signals increase the heart rate.$2$. Adre

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$A, C, E$

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(A) The heart rate is regulated by the autonomic nervous system and endocrine factors:$1$. Sympathetic nerve signals increase the heart rate.$2$. Adrenal medullary hormones (like adrenaline and noradrenaline) increase the heart rate.$3$. Thyroxine hormone increases the metabolic rate and heart rate.$4$. Parasympathetic nerve signals,the Vagus nerve (which carries parasympathetic signals),and Acetylcholine decrease the heart rate.Therefore,factors that increase the heart rate are $(A)$,$(C)$,and $(E)$.

Which of the following factors increase the heart rate?
$(A)$ Sympathetic nerve signals
$(B)$ Parasympathetic nerve signals
$(C)$ Adrenal medullary hormones
$(D)$ Vagus nerve
$(E)$ Thyroxine hormone
$(F)$ Acetylcholine

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Which of the following factors increase the heart rate?$(A)$ Sympathetic nerve signals$(B)$ Parasympathetic nerve signals$(C)$ Adrenal medullary hormones$(D)$ Vagus nerve$(E)$ Thyroxine hormone$(F)$ Acetylcholine